Answer:
3
Step-by-step explanation:
the equation is:
y=1/4x+3
If only 6 friends attended Armando's cookout, and he kept 3 cards for himself, then, 42 divided by 6 is 7.
Therefore, each friend received 7 cards.
Terriers = x
Labs = 5x
5x + x = 18
6x = 18
6x / 6 = 18/6
x = 3
There are 3 Terriers